Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f503056c70e2e1d8a7504fd842e0ec865cded1896ce62e89fd1f1a2372e0ef47' 
  AND token = '+i+uR7wIj7ATreSLJ8M/GoEJyaLQig+j+q3iGGlmGhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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