Sandbox

SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'b7797168ffcb8cd4e41b3fd117310b834fe60c77e27d85214576e7f0e729e18a' 
  AND token = 'JLlzAiAOUSaGG6qAmrT2Mkt3bmC/2gNUJ5oc/0IxlDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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