SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ae54162797b6c830c4327c4649dcf9408a68688793f222e6028193b3a19c066' 
  AND token = 'IHuZ6tYdb0Sxw/6z4stTtZunmoH+kKX1XqFj5F+WYjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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