Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0ab0f027d9a75427dc91e0d197cf2b037c3e8482cfec93e2e9fcafedf2cb118' 
  AND token = 'sBlmXXxdvdMn/iIc5r0kYh4ZhXtU7CXMzIUBBT5XRio=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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