Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c065c80338b2464e819574acba63ffa4dfcd5b1b0745b7968bf07a849e2f81ce' 
  AND token = 'cfPXgSgLfm2AXt26LGSIeJgqlzWK7j9L5nkPo7g13wI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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