SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8358a5d343e6928bd69dc44eb16b4aab2ec1a6549899f0f5303b314d76c1442b' 
  AND token = 'WsDEHwxidEl1GYUMnK++6827IVy+pQZhLyi4eJLqESo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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