Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '731beda033acbbb3969083f1b94199fbf6421a1efebe432ba5251d0317e43a98' 
  AND token = 'GzYme7lHAA3QHztbkSzjNZshTLQXTyAng9Zy6gEbgCI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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