Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9ec95162ecce646a04ccaffbf18f01d9ce96fc2bd34d5c183530f44f62f58877' 
  AND token = 'HS7tmTFUW7dUJAU39vGv+8jZELKUG8SSA8JQn0K4cAg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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