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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aac3bdfbea9b037ea4dc89f69e0a052d28bc06db657f4bbbbe0146058e8fa54b' 
  AND token = '00um8ZNkQMMEUg0gi9cTNmrTu0OJKFnvKspUV24dlEY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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