Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b59c0f344fcb10e326a62e3ec3427268437c05629ace6f2f72918ad08d02035' 
  AND token = 'x1fYsn7ixtKKqcW4CxDRnW6Nfrckh0Pd1aTBlwk44kc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}