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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ffa65eb7320f394fe92e23f8aec2f9c4ee7043f3eb3636d70a84ccba159ec36c' 
  AND token = 'IXywohrtvhuo7fhAKO0kEXE6gzeOeqxiDNHyflYy6go=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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