Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b19623cd260448e32e97b0ed500ffe19757eb493c04210c6a1a0806bb61adc54' 
  AND token = 'nn2qiUjlS4JUqAZfdw1bm37nufI8yj2R+cdJECEzT4w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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