Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c7b3c103acb81b3859b16b7c95f18f1ba46894641df25f08fb644d71cb6964d' 
  AND token = 'JrvDq+FDFhWFIiyOTJquSpnQ14/501YnAxFjtelDRd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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