Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a3de581a1ee031da60c90cb9d8c1be7dcea245f192c6c8cdffac2931fdaedd26' 
  AND token = '9CvoCyUWks4H4p3+pti4zv7gjhwPKJij9I+X6/9BQUM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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