SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '88706c284d65917525fca08aae927e5b11260310bb1b2599ac95c7fa7a21199e' 
  AND token = 'gKkMD3Wc0cj+oNhdv5FRlZpgvXNJSLdClN/kZWPoY+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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