Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15f2f873605cf8404a420bd082d8b0ab717bc188c6fb3eb49b41be9c174ee413' 
  AND token = 'Zo+Z61HbexoBL6e+sfPKzMGdzSvv8qW6O74Nly5/N8k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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