Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '71b2c8671e7111cadfbcf9ceff6bc430d440ff48e37fff30ea9a253ffea520f5' 
  AND token = '8cGP1H7XLp2mWtwKiykOcksSzwUCxxusYTSsiNZ4Ugg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}