Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e6c2b56ee093aafcf4ae212178aba49163e878639a69c7ffbd9aca26a531f45' 
  AND token = 'SSDZtIV+5R+OVOfpeb2qoTaz7eK/fA+2oVpOPXwWzYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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