Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4edfd9083d1dd6de16a74e943e3d01c6a87ec42ee7971d587a1e088935a24953' 
  AND token = 'TyYeRqYoEovY9Pf7gXvq631R1XtxNCpGBhmJLxHg0Ck=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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