Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47740b558967742f405789007b4702e2d9a37c2e559c30f68cb189b2b408e106' 
  AND token = 'OUn4zuL7jYYDwExvbMUbn46PtnraYDz5xiS4UsOnEj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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