Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '403c944e38b7f8a34bf39c9e77628fbe7625bc4b973efe1e4618e31e870720b5' 
  AND token = 'AGh4z+5ehkf4RP6Ii+gKgPSG6c7FpZpTIjf7yILW4R0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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