Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd4d4d4ff3e416b1021a531ec3f8bf381f37efab3d974bb3922c7f2ca3458e618' 
  AND token = '5FoY58/gu3dd+wYNmBxJJRD7mNtN+4x/P5fm0Er+sPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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