Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c8f820aba7818e6e6405405d19caa87b282a93f5a2236a952d52e6ce2cd9f31' 
  AND token = '2toB3ofKYY6zyV5LOpPEbChX4oD7qlA4i6wrScH+0uE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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