SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '465028fa8435693ec4f732fd47199f81fe3b749b34fe41b5747e81c67010ffd1' 
  AND token = 'GKxpv6k0ipOIlIc/gsNVngyKgSJOvRWoZc5Pv8A2hVU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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