Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe51ac890de45e0d0cc0b0c4682c837162b7c9639733b4785adbaa93085868cf' 
  AND token = 'NKM58QamKXy31GlJdKyohlQSmNcIhRrouzSSPcaQUw0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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