Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6dc6f74ec52f96350fac28f19614e461079da9090d655c13740c7cd3b158c653' 
  AND token = 'owmgAbuGCtTQZ0M4nvxN2nvo7ioI75YebT14d92ueTs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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