Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5621c0fffa91c2849480740f564373e50602778140476b8be2dbc78800aebe29' 
  AND token = 'LnblK6hX8Bg+3fL51mgT+OKmNectgBKG8MnqUcmP1/8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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