SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8a32151981f280e78ef53bac02317c34b83ab99fc2089dcf5516a6cb803100b4' 
  AND token = 'YF1juph84Mz7IEwhaTDw2aPRAQ41XJzsWqpbH+pI8Bc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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