Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '5e72360b2916002f611ca0d0f266d434c8e0a8a1940ad328bea839301d7230c4' 
  AND token = 'K1JtXwTCAKvbId8C0+JxRARQ2eVIEv/2OK20n4vVDOw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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