Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3eff47e15ae14755aa36a73424f92c9315d51f5e02a43432f7a64e58dc8d6379' 
  AND token = 'ItTUyoGHhOS3ox1Aalp2yVjGHLnSCKXZmMa3pFwOHRY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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