Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '120b30906e2ec7f21ee4909eb6c19f4f7ee8dce6eb47d4d3e415af934b39f0e4' 
  AND token = '/Ot5SRmSccArKYT2is2fwxarI1XjMtz1YjlO8KQO9W4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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