Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c910755a77c686f0b64a826f200018a00597970eda7184702228165ed9b2765' 
  AND token = 'F54XJ43TcEaVTNDyQUFL/hGP4qxT02jGFl9xx70aKiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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