Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1613d38b75c2a8cd60fa4b5a1d652d06782a9ba7f8952e880fe21249627e4339' 
  AND token = '7E9bfvS5wW9JuZoQrnC4CBADXyItdb4DDPx9hxfdoxI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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