Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee8ffae830a9d6ded189a6ea9fa42531e7536c5bc5f729cf8c6c76aa8cdb13f9' 
  AND token = 'iADUMtI7xU5MV/qkuJSO+aerREm627Fu8l4VYfqheCs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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