Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbffa470055dad7d267b6aeea08cadad4a2e9911d4ac145fd38bfd2aabb28afd' 
  AND token = '5wFPkxAl5zaOS9o+Y78rHsTZjB3sVBSldh6+cNlVluM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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