Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ab5443e20b160fff76e5e9150ee5acadac3808d9f160403464116f21587e3ae6' 
  AND token = 'RBjNi4kUpoSPGrG3uCLCRJ4SU9Dz2ftff1siWI7nbHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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