Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bd21bc3815ee006ec030cbc9b86dc9c592cb393d91d48771c14497320074e2d' 
  AND token = 'tBfUc2U2p2sL9gbUpCqethzZfH1DEtR5bwmfvO0scsI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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