Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75c2f2d216f38d52a303520b2bf16fa5db3d7e554df01de4a1fdc5171fdb5df7' 
  AND token = 'eqogrHQXWFgvqVCxpygEC08p7+6uZ+xbKqJ2W1NnTCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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