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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9cad1d33d819fab7d18afb7cebf3ac4d26a2ee841627d558a8d23f55a9b7802d' 
  AND token = 'VtSiNwR9hJxhDSAWW1QZEnG13oy/xmZSHSKGZhkia/s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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