SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '32fd278ff86b07e742050de7919536a6746693104e584100dd79dc2564753525' 
  AND token = 'Ie0MjQu9DyOOC31mBuemrYpimoOPpbwK3/2jYhmxyUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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