SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1b3be0967caf47080baba8632dbb46bcb5082709cef12871024c751143345bc0' 
  AND token = 'Al1oi7Z3LQLvEknICIizPgGXu9kBgFVjU1KWJZPEzUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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