Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abfb5fdffd648b981ad81ad39e446155fd0ce80ef37647add81938c0cfdae43f' 
  AND token = 'MOPsCbYIMw9N6PLmFDxtw8fJfntNwqw1t8v0VY0YcwE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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