Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0088e22b1bc4f919f894fe2de16f8aa9b8222b116b29eb61e5ff71dc4d9f4f79' 
  AND token = '6H7aswDWhE0F7RUhCmuL4cN17r9/O9JuBA0h+JI3IyM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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