SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd4fd04af64471e4e7cec3c891b16e704d119fe37cea2bca51e06d078534b3677' 
  AND token = '9hCnBG+A83/H+y5jGz17DZPfK95kR32avs9gIrfxAmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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