SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '499538f36917ed3b9bc4b8accea0ba323a5c84604746d5f6808ddb718c3f7d3f' 
  AND token = 'z0Ntn/WiiNC5HGihvEy/1JMO5ApEowj7qv2pFUuyqA8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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