Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4692f5cae408a38af06169e8b8531f43b2fa79154c13486cc99a09da2487277b' 
  AND token = '06MbkwZKvzeT5wNrskwwqcK4CG8S54+pkVmrwb1PLwY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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