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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '02b5ba6e330180985e8a3e9d076cced4823d16b9a921a93d306e5830869b83fa' 
  AND token = 'bmwLrwZ3WsNtYpxENgeyNngTLiOLZnPD9Wl5QZEY930=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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