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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0ee4175bf3ae73c94d4cedae810e7799e591cfe901102aa742262df5fc2f797c' 
  AND token = 'NGWNJ/nujRndXsHkvOsejUGkTIozi9Y8CEa3pXn5alo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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