Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66283e01bb012ebf1714e3298405f1b12393889bb9912657ad40ff518c7c31c1' 
  AND token = 'v+7FUqeBWf0NgeZXJ0jymF8PpSo/0bGUoE5uJM+pbMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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