Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb797ffff77489cc2a43cb2b64924ea2d4e0c16a13a3cc15314221f70c653f3a' 
  AND token = 'dZTnKB8vf2sFi7EQhiR26GXCDaSpv7o7iA5JAdW6n4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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