Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '55df3232dc3403589f0587af1cad6ded3dfe0462d7c896d274a3dd42de4f853f' 
  AND token = '4HNXs2hksMdYyNeSKXHKafuDLDGjc4n08uZgmMxjZFQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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