Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82489f4abe1390ec819934c842ff32d20eca053e5039f1c678e35d5a0763dc33' 
  AND token = 'NVaLauxq5Lw8IXyJUQGp4iKPIKclyM3xgXHCtAZWAxk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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