Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4cc9a33afc9fb72018036d6459cc19ab539162020f354dabc4b1c0e6799576f3' 
  AND token = 'AmUie1Hiy1Kv7KLpfafSfsFk7uxsRCvIMkZcPo8xjbc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00075

JSON explain

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