Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7eb222527ae032626e8ae98f9584b8883254d606763c4283c14f2e58e36195e4' 
  AND token = 'afc8T6ScBq15/ZKEHBRhXCP7b9uxU5Sgzl5E9UKg9J0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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