Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '800bf8284f98c06f3932539ea6f96c615ae6ac9aebe807805b7675c47b3f28e2' 
  AND token = '7JA2tMM2UDfQC2mKtM33yuBOQR46x+frkXRgc2ICtFw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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