Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '027ec66acec65d731366c0d507397b6f5cdb15ac75b9bcace998aa95d6cea1f6' 
  AND token = 'Qk6S0XpUjHpk5hcmsj4MSEEf+qpQEr/i1PFkuIjlMWs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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