Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8224e9cb5d9f0d67b1524882920b96eef94114bcf2665a5f6d26f2f6e0e21e27' 
  AND token = 'F/dAGAg95cYkNnzyYzCIVWQ+aJ82t9gV3aY7bEzpUzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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