Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c88a7c40325b6e2e4d13690259db38ec3fe6403bd091f3da3fd004305a8f443' 
  AND token = 'sa6KTXhGaDAToMaU85Q0wV9RHztEaBaYDBIYiNJgAIs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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