Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89dff1cf17243a714ae5d9cb6f8cb742d512689a0909eed062e47958cfcfa66e' 
  AND token = '8BZxN4u4BUgUC/Bd5cAlTB1bpqS1pvmlngqfm6TsHpA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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