Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '661ac6e3bcec005af28924125003809c7ef8ca6112a6337cde81f55418763706' 
  AND token = 'NpJAEaKLlkxV/2Ipvu/6Afq/pkpcOUnNpApjdUUjGK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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