Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b531ccb36070a53b36ed203a2b42617d80c2877a876fb4581431b71d1a654728' 
  AND token = 'Qx3PgZPWL8SAZDQ7dvfiY8LrOWzmd+i4Lf8QhV1NhOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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