Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3383e67da7ae6b6532a59030fc552f8b126f677dd3193f9a23a271d108e41fac' 
  AND token = 'mA9XI9CHkSoQwF02y52qJFw/fDexxwgXFkUFafMzfXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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