Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd89d6b8951416c96fe728baa2d1da2f9eeaaee9a386955c5edab7ddad349cbfa' 
  AND token = 'mEmCfhjwlap5FSbpXI0vzs2Hiwe4SqqRDNIPK25AEfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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