Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1c65220fc3e4b36109b897e4d967f6c73d3f3bf77ad72cca4d63711e5ee9680' 
  AND token = 'n7ce3p9QGJ2FMLq3Yo4vz0ewxVBXLyV78T09sIaP0KM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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