Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6baf81aab4e07f3a96a2207a750c5f239114b1b575a9eb214231c64e9c09b6d3' 
  AND token = 'Wpypd7pX/fW8B0EZUuez6yPYoOLnS3APQ+/9/StS33U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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