SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e444558576e8f1e0e4c41a889f5f3ad64fb4135bca8aaf9dd57f2900ca2b2d7' 
  AND token = 'vnRjV/+ssrs3tlG9kJJI6Lozzm7rgkyyi5IYSvXt2pc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}