Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '700f58dc60f00ad007770ec0870922d2bcddd0ac5a7efbf17600c544aef68afb' 
  AND token = '2txRtrx4jIlsdajvKkizU+Psl1/dPqkh92EhL6rMy9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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