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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8358dcb7a8ce3afcb7a9b0b0ab76f9a31f7012180cb5a0e4ba19168db9a8cc40' 
  AND token = 'UafF9oCIdkhrB6bMiBQTG/KbczlGj3Iz1y0xzIdoiLw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}