Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c2e62727dcac180167d6c1c1a02063d2473be31374903f94b0a742399d28f496' 
  AND token = 'OJell7t9pZtGoIdjbLBVjz55sSJl8G1ZcgSunBESPCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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