SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '2524de49e9ee11ade8d8cfd32aa80e206105a280b6bdb85aa17a02efcc4e070a' 
  AND token = 'lXmZ/qqwfZIYj/f+I+Btcc8gwhh2dpJC3PhUbvg5QOA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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