Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '263e8959ced2c3f8e243f58abc4bb52656581c527a6ea327678a7f847108e102' 
  AND token = 'EE9jbhdjE/WRe5D9vi/oXQMbXaQt1emuQM/Bh3RyoR8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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