Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7cdb63aa20489d598df4d0b760773cc4b2b6cc33344efe3eaa864237723b219d' 
  AND token = 'AfsIvOLCesAqVrmMabP/17z4NDxf263aHBG2Btkb354=' 
  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"
    }
  }
}