SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '1cf4c2ba341a0dba2568e3bc0f9a1582cdeb3016ca7b6bd469b8e4066cf543dc' 
  AND token = 'gd/fVsryXoTjqX7S8LbvWpiY1zpHhyWjGb9+6V8zQ7k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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