Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0cb0da93b1a6388ada0a8daa30c654398f057cdc972aab77d3759c9b5c9c5f29' 
  AND token = 'poTcRdyQV71mEURjkDvDqTA32h2ijO+rXCZD0scHBFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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