Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c6859531263191095d704e69162f1e621f518b423f83dc61289abcc44fb32cc9' 
  AND token = '5C+4DEAUzSrm1bkkW9/e8MqYdNs14NLlHJI8Ci8a4bg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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