Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '324b779fa191fd3ea9e4fbe767f066be8d72b0b87ebf348471cd2a7083884ac2' 
  AND token = 'rjKgrA2X7HcB8F7tjJpCHSsVfUqGkc4AVeyIhOrtFTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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