Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a2af0413345c305dc343b8bc1b451e85affd0e6100a3dd205804f9c14e7b8ade' 
  AND token = 'YgPzrf5dY+HRlF/ufWAHvpORpzalZkbScvap5xUR/kk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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