Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5aeb426005f0ee05a7e3f62fcc8b1163de749510ef37c55f3a29f04eb860a485' 
  AND token = 'gJAKT2qlAaV8Dc+qo/DEohwJSL9z5SD0P62MxXyJPHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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