Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bc922552b47659ccda7aeee72f46579849ea3d5aee86c24e5e4b4ef592dbfc2' 
  AND token = 'T4WL1bJiFGWEU5bAiAGHL+1K4hR9u3Mlo1KLm8kqwxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}