Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ffaaf4295ce90ad6fbec192b74c54047e72bdce8d40dec5fb58671775358656' 
  AND token = '8PEm6NS2/wkX2WotvxpZATvP1ua2oRk54UG/Zwj30h4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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