SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '916fa73564eb3fc9837be78cd8f088adf8e1a5867bdc83fe7b4a6b1765f0c57d' 
  AND token = 'Fpx+O+AtZHBkILkmVJBWYoKAq+g3FFfSAWMZ49kBavc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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