Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'f8f558d771d8349eb735f305e77d306e2a6a402f722bc876d5ff2191400f7dcd' 
  AND token = 'gOipbBTyEL6XWXfd3RZF9Lxdbc6phbAH7HDd9PBLzEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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