Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1af6fe27fb9ba621657da68744189a89245d591baf54d3edc1053132d806b4e9' 
  AND token = 'v3lSUx1cpgO92XwPKuo+y8oPaf3YbtdPX/0tPsU+piU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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