Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '448d2ab8422355d56f26f61218f3514f3743425668c1bc15b060e45573950c1c' 
  AND token = '3Fni7o+anpoc2BJ0A8nrP6jRjY3T7kBbrDG1mDI+9aI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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