Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3d8a8ab00640552b4632d06293287fb801b75f31ce8145830e468bd50fa01475' 
  AND token = 'mrn02zmkc62EELlK6DeULzvZdd8nWJpAACp+0u2T5N4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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