SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'cc86adc40acf6b6727713b5b9b6ad43e8c888ac6947f0601121991eb89df0138' 
  AND token = 'jEVXnFJvbeAv+PaxxOT7wUm4C861UzXZbKFCilLqMV4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00092

JSON explain

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