Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'feeb6994233125ad48a770b4bb8a566930e3062bca0fbe39eb29b95ce666b836' 
  AND token = 'ZGqotTsnk14IpQIrzSCmjG53d46StYCFseUjCxbxaGk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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