Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '670db9b886b321732ba12dab2c437713342f4e1e6e8ef054b6a20af7a5b211f3' 
  AND token = 'NyiAYhEHDEPsDcFqcvwa4AACIZsaUSd2y4Na29dDTVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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