SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd854ecfc39bd2f1df955067c224d7df573ff17e117016a862b84a33f59b7efe6' 
  AND token = 'eRQUJZFCu7L7WPjInWc/rCVpGQsh4/elJ8ZbRYy0YlI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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