Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e4a6771e881faf281e4a093542714f620f2abe261681e0485ee4052ecd2aa049' 
  AND token = 'u+uZLGUscA7w9JfVmEVwNAkNN0mrBOL4BGgv8YXAb7Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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