SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6f3159b0a1b48a91f9e52b16aa8eff3977bbd33c7570119b5c3920866f324b48' 
  AND token = 'hMec1H+f5OEA456aZuBVl28An/ZicZosK1/qHwPEYQ4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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