Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e60f19a81916d111dbd2a6e446bf52bbe98821681cfe98a4d5dadff7d8d06cf6' 
  AND token = 'IHX9WBtG1jmcRZFyZSxDCJW38L+hoe5KChw7VmfL0aM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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