Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '558796dacbba66619bd3a88005b5defbc4cc09de31a23ef808c2b92b12767c10' 
  AND token = 'QT+eBFEmq12oCsfkfo7emrKBtE40BUw4PNBlVDUk8rs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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