Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '854fb35de6addd97c7b8f79c318a76dbdff9c95bf0e7a88ebb635a595a9d99e7' 
  AND token = 'zzMzVoCVup3gHQtWTm726w1SKbcyLdNhXWOTl2BFc4A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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