Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4029e30bf3992b7b9436ea0aa226598d3c2cb4e91108f98c6ad2f83839d1b18' 
  AND token = 'szon6Plh4A+14HYid3X5g7m4gi2laPPy5QeMjhBIQhk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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