Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db8c811576c66b0af03000ebc9c0a496925fe89e99ea35a581df0d8931299151' 
  AND token = '+xx3NcdJx6+sviPL2zOZd4qGlNayWvPKQXq9W+cfUNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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