Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf33ea60d633f17e596bac85f7b86deda61566460399ab18f04b0f8ee2afb8c0' 
  AND token = '0Oo8wOXX+LtqIKKSBdx7udrTJaha4Mtcn7/bQO7vI60=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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