Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '68401f67aded7d08e9cd0386d1c0ffc84a7af99766eddafb6de4f2dee00722fd' 
  AND token = 'vWuc/SSCm/U3xTznp8uxRosH91/X8qynidsDltxGxYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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