Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '16c5082eafdb861db89aad10a7dfcce8dcd09c5479193d576e2e976cb37c050e' 
  AND token = 'qd7nMRZvVUOXagmkaDVbD5xoksThnm+6GAmt5tXl4gI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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