Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bba0373c6dcf14a55e90811d46fa86b5a8725efb8370070357ac29b9af9ef9bf' 
  AND token = 'M5S5T5yECC0s2FXNTa2Hkbz+kycShzJZ8uZaaD3c9HQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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