Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e88eef64432addbe1118cac714b6da500539ab97bf44f482c8f02c2b12f0a63' 
  AND token = '2WBFUFFPUtLoXwlpHFw2tWLLqR2pPV4vk3SaQo5a9oE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}