Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c39caba630d13d63f66bb99a1aa34499ad493bb8bce886fe77bb143d355f621' 
  AND token = '06KLy8pE1MWfH2w8q2kS4SwLj9z/GTJ10apd+gEJSbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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