Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6ec38ccbad5e32c507742a38c3fa5e7b05a3c4853082a409e2dcf13c6e15152a' 
  AND token = 'HJJ81iQp2oqD5Pa8jIi7i3uLfiWCPsaJEzSIx74+17I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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