Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '460e6c81b99841884d52fcf97526dc855a5c5de06040296c58c7a7d91211700a' 
  AND token = '0s9lVp9GcgoLp/SHiqHAe5qUd7ozAZTrv7hhS2AzDzc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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