Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0fd192add11ee6e7d00c7bf8619a15e2e9d4007d98eb2f9e90f0c6b30a0f48bc' 
  AND token = 'JtZxsZDXEvJ4Xmjd0V+hrOMbzI07BRLKG5DRyc4xu3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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