Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8fe08cf0319fd6331ee6a3bd6ef86e58aab5641217ba87ada6815c8cbf854dda' 
  AND token = 'EQ3a3JYXBNmmNMRr31g5EIE+BnfmLBD3HeSTREYjt/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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