Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8ba1d9fa5aea7635c484b195d19a88013fcda878031389235fc0f4141b15c375' 
  AND token = 'sHO9k/HnwTzD7gYplSlQa5tabpS+Us5Q5emRxDxtSIk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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