Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e6dc0e0112e854364f7264f5dab6cfe71500503185afaed41a15f51c446405a2' 
  AND token = 'u9YbiS29Qj4PqUB+Fzaw4Xl69OB9U/Qqao0VELoWM2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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