Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6887a9b63cb4e2de43e7af7277cb499a40b83d008d8c72d9fa385fb84d74c212' 
  AND token = '1GtTQI3XBpqQ0ica0szsV50G3bwG/P+xWTkGlXWcvHA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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