Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '992ae50348788fc41db69433d14dc9ecfac3a316e6466397cbf478736a469d9f' 
  AND token = 'Plkk2Xe4fmKttcuExC8rrY3/x3odW5EnKz0jQafZmjU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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