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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'cc33a50590e21448e39fae288b5cafc10241aa02399c9a5aefc3d4e386a2d150' 
  AND token = 'qnh1qlKETQYxzkvkHOMzvDxbyv1VVqSuJDwEX4C/E+8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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