Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14d20122ff60383133ecee3ee6402bde1be80c85174bdc1a941fa4a5798d9e85' 
  AND token = 'WQlTep4KTYZY4VNM61y3v2zWO0CBtnfBPZs7xLpvbVA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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