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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '411428b903b0d40ec0aeca86bbf2fd625048aabd09c4c33b3d23345b9a9cbdd7' 
  AND token = 'X/l/25+lTsAZyTHYEiPqc4uxz92EC8h11B3jzQjVybA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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