Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c25b2cd2bbb076222728314f5f9a98544e3bc220feea88c065a9d68a65a8de93' 
  AND token = '7l/qlFhBzyt7d9y3W8OfaAgwHQIRcFxcManEoKO6VN0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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