Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1a10361d8c06dabc5cf475b32a183c45c20dc7fbf349f5b8d8ec24d9268cce0' 
  AND token = 'SpFnALsX5dxmF0ffWUeRipDuyPPCldl+lt5cWvKgrVc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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