Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '32f2f1f97a9f92371fd354afaad7fbda2b6d9679440998da5c8333b64ab9414c' 
  AND token = 'LN2kxKfxdD33Tsf1tvKIR0I8RYBrRGophy7x9C8BwLs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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