Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f0f36f7325fcf498cda0f21c44c6da940269feaceb301e908f3be9659b1e03d9' 
  AND token = '8X1G3b/5IpipKu76h2EpiPDIRMwsIqOgx/CrwvrOSNk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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