Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '287858622480a63ed9596ccb2e1c407b657d2ecb7013c3e632238f7380fec0a1' 
  AND token = '2WMr2JXRj1LzXzd8+bQ9L8k7e15e7NX2f1sH3tHf4Wk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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