Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6b3c39163d722aae4932e54086e6be09985c65fa43c206198bb2b0bdfd986ab6' 
  AND token = 'pEx8D6GhD2c6xO8uJH96cA803pHkzjYlSxC6eQwrN50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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