Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ff46ee07444b72926e8efa3552adaadecb6b5a3d560bf9c0e406c498eeefd747' 
  AND token = 'chi6/KN9ft84cl7lXnRt9fYv/Akjk0LcG5r/RwMzmWY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00058

JSON explain

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