Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca896cb2b5f4519b5421e3fc989b320c5bf7ce56ceb4f57d48e53d6ba8d9b3a1' 
  AND token = '8TucoUdd3BNaziwyV86xYJc/NV6zpP0xVzDVpkjlgaw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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