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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '468bfeb2ea649405f135841172d09deac5ec9d1b287265aae506e339af5520c6' 
  AND token = '2GKfPDKwulKRzz37w9Y5eNZ721hl1WxWwu057wY71QM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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