Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '855aa208546cf502ce0180e90b8e3a1862ad88478b5bfd32c72e41cb418817da' 
  AND token = 'O3Wj2J/RO0f6P/mm0BrA7M6QVnpGykWv95wKkPgdd5g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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