Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '86c19deda92ca035a2e6fde7ad2b55f52b28dd52cfb638952fd6d90cfa9ce368' 
  AND token = 'EN8LU6y9GEmFvaJQJuKSVlw4EoWCEy8aozl2qaFJGqs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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