Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '031e4b7638be0bb2b243b778e39fe55ddac33bd5dfc66cf1dc26b424f1a1a717' 
  AND token = 'WZMyfU4I7XujuVGQ8icp7rPbh39h5kmDNMiJEAarZIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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