Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd2715ed6432fdec7d19b2ee4db032824d09c88e19bd09989182b93ebe8346113' 
  AND token = 'Ulf97z1Qm03if3LCqe0zsY6iEKv5aWwBUD6McHO1qfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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