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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '992c02a98ef220559d88b43c3bb4a609ab024d68a83f8f681ee82fc2276b7bc5' 
  AND token = 'HaocxLAJshsUhcUFhsBK735ZWUiQYxea0XVqxBNbmW8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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