Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fccfc51235b2e73ad96439fd9b38ebecd7aafb458e30f2acc0ee88c80df152ca' 
  AND token = 'jcGG+gbHkeDASKeFxO7HbsyDsKy0WyAt4HOq2x1eaFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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