Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a0f1fa595dc361e0adbdcf71f78d685d308fe3d10f21518c06aa006f815ed67a' 
  AND token = 'dFNbo+XbAaF1B3qpseVsZ7aq8FyBHirNWntIUrAKkKQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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