Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aeed9035db4b18cfb1d36cc1270fafe62d914d6d5161bdc124b579ff7a350eb0' 
  AND token = 'GlgSBaCfGvjdKrWY/4QeUN+4q0wNkyCw9yl6eZVSa3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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