Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0e5d845d286618bc9da28d67392655c820c0b37f77f81ada190fd04d81277814' 
  AND token = '6maNDMmRNN1qeqSPYGVGmGEYPxBjnbvdtXGZSZYeDSQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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