Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '376762aae6a74b870e935f2eea0c8b58050f37d17c87aa0a4f5650f66ed88386' 
  AND token = 'doVyTAAOF5vAhMIflodpXNR5R8an6R/wN+2dtNMFtmw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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