Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '408a61a01974c8936c5441668f78d7c52e278dbd941e26bfa7f45cb8d39a0c8f' 
  AND token = 'u1MyN3g9Ek8IuIkmPqzsGKXnyw8IDd3axOgui4eC8H8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}