Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1905e266d725efaed180161dcfefc9751b99337d138bc827088c104af051db33' 
  AND token = '9cnV/7uXI+tvq/imSdBDoxvS2SNqZIskKLRbUU16AHQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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